{{Short description|Order of bacteria}} {{Automatic taxobox | name = Chromatiales | image = Chromatium Okenii al microscopio.jpg | image_caption = ''Chromatium okenii'' in the microscope at 600x magnification. | taxon = Chromatiales | authority = Imhoff 2005<ref>IMHOFF (J.F.): Order I. Chromatiales ord. nov. In: D.J. BRENNER, N.R. KRIEG, J.T. STALEY and G. M. GARRITY (editors), Bergey's Manual of Systematic Bacteriology, second edition, vol. 2 (The Proteobacteria), part B (The Gammaproteobacteria), Springer, New York, 2005, pp. 1-3.</ref> | type_genus = ''Chromatium'' | type_genus_authority = Perty 1852 (Approved Lists 1980) | subdivision_ranks = Families | subdivision = *''Chromatiaceae'' <small>Bavendamm 1924 (Approved Lists 1980)</small> *''Acidihalobacteraceae'' <small>Chuvochina ''et al.'' 2024</small> *''Aquisalimonadaceae'' <small>Chuvochina ''et al.'' 2024</small> *''Ectothiorhodospiraceae'' <small>Imhoff 1984</small> *''Granulosicoccaceae'' <small>Lee ''et al.'' 2008</small> *''Halofilaceae'' <small>Chuvochina ''et al.'' 2024</small> *''Halorhodospiraceae'' <small>Imhoff ''et al.'' 2023</small> *''Halothiobacillaceae'' <small>Kelly and Wood 2005</small> *''Methylohalomonadaceae'' <small>Sorokin and Merkel 2023</small> *''Natronospiraceae'' <small>Sorokin ''et al.'' 2025</small> *''Nitrococcaceae'' <small>Chuvochina ''et al.'' 2024</small> *''Nitrosococcaceae'' <small>Chuvochina ''et al.'' 2024</small> *''Oceanococcaceae'' <small>Chuvochina ''et al.'' 2024</small> *"''Ca. Poriferisulfidaceae''" <small>Chuvochina ''et al.'' 2023</small> *''Sedimenticolaceae'' <small>Slobodkina ''et al.'' 2024</small> *"''Ca. Tenderiaceae''" <small>Chuvochina ''et al.'' 2023</small> *''Thioalkalibacteraceae'' <small>Boden 2017</small> *''Thioalkalispiraceae'' <small>Mori ''et al.'' 2011</small> *''Thioalkalivibrionaceae'' <small>Chuvochina ''et al.'' 2024</small> *''Thiocapsaceae'' <small>Bavendamm 1924 (Approved Lists 1980)</small> *''Thiohalomonadaceae'' <small>Sorokin and Merkel 2023</small> *''Thiohalophilaceae'' <small>Sorokin and Merkel 2023</small> *''Thiohalospiraceae'' <small>Sorokin and Merkel 2023</small> *''Thioprofundaceae'' <small>Kojima ''et al.'' 2017</small> *''Wenzhouxiangellaceae'' <small>Wang ''et al.'' 2015</small> *''Woeseiaceae'' <small>Du ''et al.'' 2016</small> *"''Aquichromatiaceae''" <small>Yang ''et al.'' 2017</small> | synonyms = ''Ectothiorhodospirales'' <small>Chuvochina ''et al.'' 2024</small> <br> ''Granulosicoccales'' <small>Chuvochina ''et al.'' 2024</small> <br> ''Halothiobacillales'' <small>Chuvochina ''et al.'' 2024</small> <br> ''Nitrococcales'' <small>Chuvochina ''et al.'' 2024</small> <br> ''Methylohalomonadales'' <small>Sorokin and Merkel 2023</small> <br> ''Natronospirales'' <small>Sorokin ''et al.'' 2025</small> <br> ''Nitrosococcales'' <small>Chuvochina ''et al.'' 2024</small> <br> ''Thiohalomonadales'' <small>Sorokin and Merkel 2023</small> <br> ''Thiohalospirales'' <small>Sorokin and Merkel 2023</small> <br> ''Woeseiales'' <small>Chuvochina ''et al.'' 2024</small> <br> "''Ca. Tenderiales''" <small>Chuvochina ''et al.'' 2023</small> }}
The '''''Chromatiales''''' are an order of ''Gammaproteobacteria'' within ''Pseudomonadota''. Like other Proteobacteria, the ''Chromatiales'' are Gram-negative and can be spherical, vibrioid, spiral or rod-shaped.<ref name=Aeriopus>{{cite journal | last1=Yang | first1=Liqiang | last2=Tang | first2=Lili | last3=Liu | first3=Lan | last4=Salam | first4=Nimaichand | last5=Li | first5=Wen-Jun | last6=Zhang | first6=Yongyu | title=''Aquichromatium aeriopus'' gen. nov., sp. nov., A Non-phototrophic Aerobic Chemoheterotrophic Bacterium, and Proposal of Aquichromatiaceae fam. Nov. In the Order Chromatiales | journal=Current Microbiology | date=2017 | volume=74 | issue=8 | pages=972–978 | doi=10.1007/s00284-017-1275-1 | pmid=28585047 | url=https://link.springer.com/article/10.1007/s00284-017-1275-1 | url-access=subscription }}</ref>
== Classification ==
Some members of the order comprise the primarily anaerobic and phototrophic purple sulfur bacteria (PSBs), found specifically within the families ''Chromatiaceae'' and ''Ectothiorhodospiraceae''. Other members, like those in the families ''Halothiobacillaceae'' and ''Thioalkalibacteraceae'', are aerobic and chemolithoautotrophic.
== References == {{Reflist}}
== External links == * [https://lpsn.dsmz.de/order/chromatiales LPSN page on Chromatiales]
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Category:Chromatiales Category:Gammaproteobacteria
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